我试图在客户端运行此程序，但我不明白它是如何在服务器端运行，并不运行客户端 .

import java.rmi.Remote;

import java.rmi.RemoteException;

public interface Interface extends Remote{

    void guessNumber() throws RemoteException;

}





import java.util.Random;

import java.util.concurrent.TimeUnit;

public class Implement implements Interface{

    @Override
    public void guessNumber() {

        System.out.println("RMI server is running...");

          int number;
            int guess;
            Random random = new Random();

            number = random.nextInt(20)+1;
            guess = random.nextInt(20)+1;

            System.out.println("Server guess the number!");





            while(number != guess) {

                if (number > guess) {

                    System.out.println("Client:" + guess);

                    System.out.println("Guess a greater number:");

                    guess = random.nextInt(guess)+(20-guess-1);

                    try {
                        TimeUnit.MILLISECONDS.sleep(500);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }

                else if (number < guess) {

                    System.out.println("Client:" + guess);

                    System.out.println("Guess a smaller number:");

                    guess = random.nextInt(guess)+1;

                    try {
                        TimeUnit.MILLISECONDS.sleep(500);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                }

            }


            System.out.println("Correct number is: " + number);

    }



}




import java.rmi.registry.LocateRegistry;

import java.rmi.registry.Registry;

import java.rmi.server.UnicastRemoteObject;

public class Server extends Implement{

    public Server() {} 
       public static void main(String args[]) { 
          try { 
             // Instantiating the implementation class 
             Implement obj = new Implement(); 

             // Exporting the object of implementation class  
             // (here we are exporting the remote object to the stub) 
             Interface stub = (Interface) UnicastRemoteObject.exportObject(obj, 0);  

             // Binding the remote object (stub) in the registry 
             Registry registry = LocateRegistry.getRegistry(); 

             registry.bind("Interface", stub);  
             System.err.println("Server ready"); 
          } catch (Exception e) { 
             System.err.println("Server exception: " + e.toString()); 
             e.printStackTrace(); 
          } 
       } 


}




import java.rmi.registry.LocateRegistry;

import java.rmi.registry.Registry;

public class Client {

    private Client() {}  
       public static void main(String[] args) {  
          try {  
             // Getting the registry 
             Registry registry = LocateRegistry.getRegistry(null); 

             // Looking up the registry for the remote object 
             Interface stub = (Interface) registry.lookup("Interface"); 

             // Calling the remote method using the obtained object 
             stub.guessNumber(); 

             // System.out.println("Remote method invoked"); 
          } catch (Exception e) {
             System.err.println("Client exception: " + e.toString()); 
             e.printStackTrace(); 
          } 
       } 

}
java rmi